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A. J. CRANE. DRAFT EQUALIZER AND SPARK ARRESTER.

Patented Apr. 10, 1888.

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UNITED STATES PATENT Orricn.

ANDREW J. CRANE, OF DUN MORE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO GEORGE B. SMITH, OF SAME PLACE.

DRAFT-EQUALIZER AND SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 380,677 dated April 10, 1888.

Application filed July 25, 1887. Serial No. 245,227. (No model.)

To all whom it may concern.-

Be it known that 1, ANDREW J. CRANE, a citizen of the United States of America, residing at Dunmore, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in 2. Combined Draft-Equalizer and Spark-Arrester, of which the following is a specification, refer ence being had therein to the accompanying drawings. I

My invention relates to improvements in loeomotives; and it has for its object to provide means for distributing the draft uniformly to all the fines, and incidentally to arrest the sparks, this uniform distribution of the draft serving to work the fire in a superior manner and enabling me to enlarge the draft-nozzle, thus reducing the force of draft and avoiding back-pressure on the pistons.

The invention will first be described in connection with the accompanying drawings, and then pointed out in the claims.

Figure 1 of the drawings is a vertical sec tion of the forward end of the boiler, thesmokebox, flue-head, tubes, 8a)., and also a section of the perforated draft-pipe, the diaphragm, and the deflectors. Fig. 2 is an enlarged vertical section of the flue-head, the diaphragm, and the deflectors. Fig. 3 is a front end view of the boiler with the diaphragm in place. Fig. 4 is a plan view of one of the deflectors detached. Fig. 5 is a front view of the smokebox with its door removed, showing the door in the draft-pipe.

Referring to the drawings, A represents the boiler; B, the dry-pipe; G, the fines; D, the flue-head,- E, the smoke-box, provided with the usual circular door, 6, and cinder-escape e; and F, the smoke-stack. All of these parts are of common construction.

G represents a perforated and transverselyslotted metal diaphragm, the slots being about one and one-half inch wide and four inches apart. This diaphragm (which is preferably madein two pieces, as seen in Fig. 3) is located in front of the flue-head and extends from abovethe upper row of fines to within about five inches of the bottom of the smoke-box, being secured to the flue-head by angle-bars g at top and bolts 9, encircled by tubular sleeves 9 at bottom, as clearly shown in Fig. 2.

H represents a series of perforated deflectors of the form shown in Fig. 4, each having an inwardly-extending flange, h, at its upper side. These deflectors are secured to the diaphragm G, in such position as to stand directly in front of its slots, by bolts h, the lower bolt of each deflector being provided with :a tubular sleeve, h, for holding the lower side of the deflector the proper distance from the diaphragm.

I represents the draft-pipe extending from the bottom of the smoke-box to the bottom of the smoke-stack, to which it is attached in any suitable manner. This pipe is perforated throughout its length, and I prefer to make it in three pieces, z t i, the pieces 2' and i fitting telescopically into and bolted to the piece i, which latter is braced by angle-bars 0, bolted to it and to the sides of the smokebox, as seen in Fig. 5. A door, (2, covers a hand-hole in the draft-pipe.

J represents the exhaust-pipe, and K the exhaust-nozzle attached thereto, both of usual construction and arrangement.

It will be readily understood that by means of the perforated draft-pipe and the peculiar construction and arrangement of the diaphragm and deflectors, when the steam is exhausting through the nozzle, the draft will be distributed to all the flues alike, as indicated by the arrows. Vith such a distribution of the draft there is no necessity for a very strong one, and consequently I am enabled to use a nozzle of such size as will prevent back-pressure on the 3 5 pistons, and, furthermore, with a good draft through all the flues, the fire will be better worked than if there were a'strong draft through some and little or none through others. As is apparent, the perforated draft-pipe will arrest the sparks and cinders and cause them to fall within the smokebox, from which they can be discharged through the cinder-escape e.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is"- 1. The combination, with the flue-head, a perforated draft-pipe, and an exhaust-nozzle within said pipe, of a slotted and perforated diaphragm secured to the flue-head and a series of perforated deflectors secured to the diaphragm in front of the slots, for the purposes above set forth.

2. The combination, with the flue-head, a perforated draft-pipe, and an exhaust-nozzle within said pipe, of a perforated and transversely-slotted diaphragm secured to the fluehead and a series of perforated fiangeddeflectors secured to the diaphragm in front of the slots, in the manner and for the'purposes above set forth.

3. The combination, with the flue-head, the

smoke-box, the smoke-stack, a draft-pipe ex- 15 tending from the bottom of said box to the bottom of the stack and perforated throughout its length, and an exhaust-nozzle within said pipe, of a slotted and perforated diaphragm secured to the flue-head and a series of perfo- 20 rated deflectors secured to the diaphragm in front of the slots, for the purposes set forth.

In testimony whereof I aihx my signature in presence of two witnesses.

ANDREW J. CRANE. \Vitnesses:

GEo. B. SMITH, WlLson D. DECKER. 

